D-dualized D-brane

Abstract

We further investigate the dimensional duality (D-duality) proposed in arXiv:0705.0550 by mainly focusing on the properties of D-branes in this background. We derive the world-sheet correspondence of static D-branes, and discuss the fate of non-static D-branes from the world-sheet viewpoint. The quantum string production with or without D-branes is also studied from the time-like Liouville theory. We find that the closed string production from the background is much larger than that from D-branes decaying into nothing.

Supercriticality of a class of critical string cosmological solutions

“…We may find a dual conformal field theory in which the supercriticality is manifest by using different kinds of gauge fixing procedure along the line [31]. For the accelerating expanding background [17], there is a paper [32] which appeared recently, which shows that the "D-dual" description of a Riemann surface of genus h can be expressed in terms of its 2h dimensional Jacobian torus, perturbed by a closed string tachyon arising as a potential energy term in the worldsheet sigma model (see also the discussion on the dualized D brane in [33]). Since our manifold contains a AdS factor (the Euclidean version), we may study the dual theory from the AdS/CF T correspondence as discussed also in [32].…”